Gypsum, popular sulfate mineral of fantastic business worth, composed of hydrated calcium sulfate (CaSO4·2H2O). In very well-developed crystals the mineral frequently has become termed selenite. The fibrous huge wide range has a silky lustre and known as satin spar; it is translucent and opalescent and is also valued for ornaments https://www.propanraya.com/id/produk/eco-gypsum-ee-4050